Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 52, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 16, 1990, 6:43 PM CDT for Sioux County, Iowa. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Jun 16, 1990, 6:43 PM CDT (23:43 UTC)
- Expired
- Jun 16, 1990, 7:12 PM CDT
- In force
- 29 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Sioux County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.7 hours before the alert went out and 197 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3656 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 162344
SVRFSD
IAC167-170015-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
643 PM CDT SAT JUN 16 1990
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN NORTHWEST IOWA
...SOUTHERN SIOUX
SOME CITIES INCLUDED IN THIS WARNING ARE SIOUX CENTER AND ALTON.
AT 640 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 35 MILES SOUTH
SOUTHEAST OF SIOUX FALLS IN SOUTHWEST SIOUX COUNTY OF IOWA. THE STORM
WAS MOVING EAST AT 30 MPH.
IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD GET TO A
REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES WINDS IN EXCESS
OF 60 MPH...HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING...AND HEAVY
RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA.
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 16, 4:24 PM CDT, 2 hours 19 minutes before
IAZ004-162220- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 423 PM CDT SAT JUN 16 1990 ...A FLASH FLOOD WATCH FOR NORTHEAST NEBRASKA AND NORTHWEST IOWA TONIGHT... ...A TORNADO WATCH FOR NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA UNTIL 9 PM CDT... A FEW THUNDERSTORMS WERE ACROSS NORTHWEST NEBRASKA AND SOUTHEAST SOUTH DAKOTA THIS AFTERNOON. AT 4:18 PM CDT RADAR SHOWED A SEVERE THUNDERSTORM 60 MILES NORTHWEST OF SIOUX CITY. THE STORM WAS MOVING NORTHEAST AT 30 MPH. A FLASH FLOOD WATCH MEANS FLOODING IS POSSIBLE IN AND NEAR THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD KEEP INFORMED AND BE READY FOR QUICK ACTION IF FLASH FLOODING IS OBSERVED OR A WARNING IS ISSUED. HOPPES
Special weather statement, Jun 16, 5:00 PM CDT, 1 hour 43 minutes before
SDZ018-162230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 500 PM CDT SAT JUN 16 1990 ...THUNDERSTORM WITH VERY HEAVY RAIN OVER SOUTHWEST TURNER COUNTY OF SOUTHEAST SOUTH DAKOTA... AT 455 PM CDT RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN 30 MILES SOUTHWEST OF SIOUX FALLS NEAR CENTER POINT SOUTH DAKOTA. THIS STORM WAS MOVING NORTH NORTHEAST AT 30 MPH AND WILL AFFECT PERSONS IN TURNER COUNTY THROUGH 530 PM CDT. x SMALL HAIL...GUSTY WINDS AND BRIEF HEAVY RAINS CAN BE EXPECTED WITH THIS STORM.
Special weather statement, Jun 16, 5:11 PM CDT, 1 hour 32 minutes before
SDZ017-018-019-020-162300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 510 PM CDT SAT JUN 16 1990 ...TORNADO WATCH IN EFFECT FOR SOUTHCENTRAL AND SOUTHEAST SOUTH DAKOTA... AT 505 PM CDT SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED IN SOUTHEAST SOUTH DAKOTA. STRONG THUNDERSTORMS WERE SCATTERED SOUTH OF I-90 FROM SIOUX FALLS TO 30 MILES WEST OF MITCHELL. VERY HEAVY RAINS AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS. MOVEMENT NORTHEAST AT 30 MILES AN HOUR. BERG/SHEEHAN
Special weather statement, Jun 16, 5:22 PM CDT, 1 hour 21 minutes before
IAZ004-162320- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 521 PM CDT SAT JUN 16 1990 ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA AND NORTHWEST IOWA TONIGHT... ...A TORNADO WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA UNTIL 9 PM CDT... A FEW THUNDERSTORMS WERE ACROSS NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA THIS AFTERNOON. AT 5:16 PM CDT RADAR SHOWED THUNDERSHOWERS IN UNION COUNTY SOUTH DAKOTA NEAR ELK POINT AND VERMILLION SOUTH DAKOTA. STRONGER THUNDERSTORMS WERE FARTHER TO THE WEST. THE STORMS WERE MOVING NORTHEAST AT 20 MPH. A FLASH FLOOD WATCH MEANS FLOODING IS POSSIBLE IN AND NEAR THE WATCH AREA. PEOPLE IN THE_ WATCH AREA SHOULD KEEP INFORMED AND BE READY FOR QUICK ACTION IF FLASH FLOODING IS OBSERVED OR A WARNING IS ISSUED. HOPPES
Special weather statement, Jun 16, 5:45 PM CDT, 58 minutes before
IAZ004-162330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 544 PM CDT SAT JUN 16 1990 ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA AND NORTHWEST IOWA TONIGHT... ...A TORNADO WATCH IS IN EFFECT FOR NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA UNTIL 9 PM CDT... A STRONG THUNDERSTORM WAS MOVING INTO NORTHERN UNION COUNTY SOUTH DAKOTA LATE THIS AFTERNOON. AT 5:43 PM CDT RADAR SHOWED A THUNDERSTORM ENTERING NORTHWEST UNION COUNTY. THE STORM WAS MOVING NORTHEAST AT 20 MPH. THE STORM WILL PRODUCE LOCALLY HEAVY RANFALL AND MAY PRODUCE PEA TO MARBLE SIZE HAIL. PEOPLE IN NORTHERN UNION COUNTY SHOULD BE ALERT TO CHANGING WEATHER CONDITIONS AND BE PREPARE~D TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. HOPPES
Special weather statement, Jun 16, 6:16 PM CDT, 27 minutes before
SDZ017-018-019-020-162300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 615 PM CDT SAT JUN 16 1990 ...TORNADO WATCH IN EFFECT FOR SOUTHCENTRAL AND SOUTHEAST SOUTH DAKOTA UNTIL 7PM CDT... AT 605 PM CDT SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED IN SOUTHEAST SOUTH DAKOTA. THE THUNDERSTORMS WERE LOCATED SOUTH OF A LINE FROM SIOUX FALLS TO MITCHELL SOUTH DAKOTA. STRONGER THUNDERSTORMS WERE LOCATED 30 MILES SOUTH OF SIOUX FALLS OR JUST NORTHEAST OF BERESFORD AND JUST NORTH OF YANKTON. THESE STORMS ARE CAPABLE OF DANGEROUS CLOUD TO GROUND LIGHTNING... HAIL AND GUSTY WINDS. < THESE STORMS CAN PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON NTHE LOOKOUT AND LISTEN TO LATER STATEMENTS AND WARNINGS. MOVEMENT OF THE STORMS WAS NORTHEAST AT 35 MILES AN HOUR. SHEEHAN
Nearby
Severe Thunderstorm Warnings in Iowa, 1990Every severe thunderstorm warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.